Gardens of Babylon

Build the Gardens of Babylon with pillars, mezzanines, aqueducts, waterproofing, the Archimedes screw, using clay, stone, wood and lead. Collect and plant sets of seedlings (points for variety and sets; like the science cards in 7 Wonders?). Special "tree" cards - collect a set, stick a tree somewhere for bonus points. Secure gold to pay for it all from the royal court, or failing that bribe officials, blackmail merchants or loot their caravans; but avoid getting caught (fine, thrown in jail miss a go, or some other penalty), and pay your thugs well so they don't defect (lose gold + random penalty?). Survive floods, droughts, earthquakes, and invading armies.

Points for construction (higher layers have 2x, 3x multipliers), plant varieties and sets, trees, and remaining gold.

Can this be done so it isn't multiplayer solitaire - everyone's building the same one?